CN1988417A - Broad frequency path combining method and its path combining device - Google Patents
Broad frequency path combining method and its path combining device Download PDFInfo
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- CN1988417A CN1988417A CN 200610125436 CN200610125436A CN1988417A CN 1988417 A CN1988417 A CN 1988417A CN 200610125436 CN200610125436 CN 200610125436 CN 200610125436 A CN200610125436 A CN 200610125436A CN 1988417 A CN1988417 A CN 1988417A
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Abstract
This invention relates to a wide frequency merging method and a merger realizing merged output of two-band signals, in which, wide band signals pass through channel A and narrow band signals pass through channel B characterizing in selecting a band-rejection filter cavity of narrow band signals in channel B to filter the wide band signals in channel A to let wide band signals pass through it and selecting a band pass filter cavity to filter the narrow band signals in channel B. This invention only uses a band-rejection filter cavity of one band to the wide band signal channel.
Description
Technical field
The present invention relates to a kind of multifrequency and close wideband path combining method and mixer thereof in the system of road.
Background technology
Along with the arrival in 3G epoch, multi-operator, multiband cover the content that has become more consideration in the present signal covering.China's existing mobile communication network has the GSM900/DCS1800 of China Mobile, the GSM900/DCS1800 of CHINAUNICOM and CDMA800, the PHS of China Telecom, Netcom, WLAN, Digital Clustering and other communication systems.Also have WCDMA on the horizon, CDMA2000, TD-SCDMA 3-G (Generation Three mobile communication system) or the like.So many network often is required that shared a few antenna covers, system close the road, along separate routes the time, requirement can realize low Insertion Loss, the high isolation is to reach satisfied coverage effect.
Traditional alien frequencies mixer generally considers to adopt the form of multichannel unification to realize closing the road, generally can take multichannel and connect filtering respectively to realize in the method for closing road output according to the frequency range that need close the road.In the mixer of All-in-One, the resonant cavity frequency-selecting becomes important implementation, and its advantage is that Insertion Loss is little, and band is outer to suppress high.Shortcoming is that volume is very big, the cost height, because will adjust the frequency characteristic of a plurality of cavitys, and the also cumbersome (see figure 1) of the realization of device.
Summary of the invention
The purpose of this invention is to provide a kind of wideband path combining method and mixer thereof, utilize the wideband mixer of bandreject filtering technology, volume is small and exquisite, and index is outstanding, has fundamentally solved the shortcoming of traditional broadband alien frequencies mixer.The present invention is mainly used in multifrequency and closes in the system of road, mainly be in order to solve the multiband of multi-operator, the overlapping covering of multi-modulation scheme communication system and development product will play an important role in following multisystem, multi-operator epoch, can have the market space widely.
Technical scheme of the present invention is: a kind of wideband path combining method, export on the road of closing of two frequency band signals of realization, wherein passage A is by one section broadband signal, channel B is by narrow frequency signal, it is characterized in that: filtering is carried out in the bandreject filtering chamber to narrow frequency signal among the broadband signal selector channel B in passage A, make it by broadband signal,, select the bandpass filtering chamber of this narrow frequency signal to carry out filtering the narrow frequency signal in the channel B.
Path combining method of the present invention can also be expressed as the following step:
A. by the two paths of signals of this mixer, the one tunnel is certain special frequency channel signal (frequency range is narrower), and other one the tunnel is the broadband signal (frequency range broad) except that this frequency range.
B. carry out filtering for narrowband channel select tape pass filter chamber.
C. carry out filtering for the wideband channel selecting at the bandreject filtering chamber of signal in the narrowband channel.
D. two paths of signals is closed road output.
Aforesaid wideband path combining method, it is characterized in that: passage A stops the WLAN signal to pass through with WLAN signal bandreject filtering chamber, and allow to pass through GSM, DCS, wideband signals such as 3G, another channel B by the WLAN signal, is closed close road that road output realize broadband signal with two paths of signals with WLAN signal bandpass filtering chamber.Can select interior signal of any frequency range and the broadband signal in other frequency ranges to do and close the road processing.As:
Adopt the wideband mixer of said method, it is characterized in that: it has two input channel A and B, passage A passes through broadband signal, another channel B is by narrow frequency signal, passage A comprises input port, the bandreject filtering chamber of narrow frequency signal in input lead and the channel B, input port is connected on the bandreject filtering chamber through input lead, outputs to through coupled-wires and closes road port C; Channel B comprises the bandpass filtering chamber of input port, input lead and narrow frequency signal, and input port is connected on the logical resistance of the band filtering chamber through input lead, outputs to through coupling line and closes road port C.
Adopt the wideband mixer of said method, it is characterized in that: described bandreject filtering chamber is WLAN signal bandreject filtering chamber.
Aforesaid wideband mixer is characterized in that: its principle equivalent electric circuit of the bandreject filtering chamber among the described passage A is by L
a, L
h, C
a, C
bThe LC filter that constitutes, or the equivalent electric circuit of this LC filter.
The operation principle of the embodiment of the invention is: full range signal admission passage A, enter WLAN signal bandreject filtering chamber by lead, filtered the signal of WLAN frequency range, other frequency band signals be able to by; Full frequency band signal admission passage B enters WLAN signal bandpass filtering chamber by lead, the WLAN in-band signal be able to by, other signals are filtered; The output lead ECDC road of last passage A and channel B is from closing road port C output.
Useful effect: the present invention is a kind of two-way input, utilizes the wideband path combining method and the mixer thereof of bandreject filtering technology.Signal in any frequency range and the broadband signal except that this frequency range can be closed the road, the present invention adopts the bandreject filtering chamber to the broadband signal passage, so not only makes the index of broadband signal become very easy adjustment and Insertion Loss, ripple, indexs such as return loss are also all very outstanding.Because the cavity classification of using is few, the structure of device is very small and exquisite than conventional products, greatly reduces cost, has also simplified the accent survey work of index.
Hereinafter, we close the road with the broadband signal of 800-2200MHz and the WLAN signal in the 2400-2500MHz frequency range is example, describes.In actual applications, we can be changed to other narrow frequency signal with WLAN signal among the embodiment as required, and the signal of 800-2200MHz is replaced with needed broadband signal.
Utilize path combining method of the present invention, realize the mixer spare of broadband signal (800-2200MHz) and WLAN (2400-2500MHz) signal, volume is light and handy, and cost is less, and index is outstanding, also very is convenient to regulate.The broadband signal of 800-2200MHz has comprised all main frequency ranges of present radio communication, and therefore this mixer can be widely used in closing in the road of multisystem.
Description of drawings
Fig. 1, four traditional unification alien frequencies mixer schematic diagrames.
Fig. 2, the wideband mixer block diagram that utilizes the bandreject filtering technology of the two-way input of the embodiment of the invention.
Fig. 3, the resonant cavity equivalent circuit theory schematic diagram of the embodiment of the invention.
Fig. 4, the channel frequence characteristic schematic diagram of the embodiment of the invention.
Fig. 5 is the wideband mixer front internal structural map of the embodiment of the invention.Wherein, 1, coupling column, 2, tuning screw rod, 3, N type cable end (closing the crossing), 4, screw (attached cable head), 5, screw (securing cover plate), 6, N type cable end (WLAN passband chamber), 7, N type cable end (WLAN stopband chamber), 8, input lead, 9, adjusting rod assembly, 10, coupled-wires.
Fig. 6 is the positive external structure figure of Fig. 5.
Fig. 7 is the lateral outer structural map of Fig. 5.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
Embodiments of the invention as shown in Figures 2 and 3.It has two input channel A and B, and passage A passes through GSM, DCS, and wideband signals such as 3G, another channel B is by the WLAN signal; Passage A comprises input port, input lead and WLAN signal bandreject filtering chamber, and the annexation of each parts is as follows: input port is connected on the bandreject filtering chamber through input conduction band line, outputs to through coupled-wires and closes road port C.The circuit of its principle of WLAN signal bandreject filtering chamber among the passage A is by L
a, L
h, C
a, C
bThe LC filter that constitutes, or this LC filter equivalent electric circuit.Channel B is similar to passage A operation principle, and difference is that channel B is the passband filtering chamber of WLAN.
As shown in Figure 4, two frequency diagram are respectively in the embodiment of the invention among the figure, the frequency characteristic of two passages of mixer.WLAN stopband passage is used for by the signal in the 800-2200MHz frequency range, and WLAN passband passage is used for by the WLAN signal in the 2400-2500MHz.
Major technique characteristics of the present invention are exactly in the broadband signal passage, have adopted the stopband filtering principle at narrow channel frequency signal to design.She Ji advantage is like this, when broadband signal is passed through, has good ripple, Insertion Loss, indexs such as standing-wave ratio.When cavity being carried out the frequency characteristic adjustment, owing to only the stopband chamber of a frequency range is adjusted, workload can be fewer, and the volume of device and cost have also all obtained reduction.
Referring to Fig. 5.Fig. 5 is the wideband mixer front internal structural map of the embodiment of the invention, in the cavity of Fig. 5, and two parts of isolating mutually about being divided into.The left side is WLAN stopband filtering chamber A, and the right side is WLAN passband filtering chamber B.WLAN stopband filtering chamber includes N type cable end 7, input lead 8, and coupling column 1, coupling column 1 have five.WLAN passband filtering chamber is similar to stopband filtering cavity configuration, between second and the 4th coupling column, used adjusting rod assembly 9, the final section coupling column 1 in two filtering chambeies is connected by coupling lead 10, and an other end of coupled-wires 10 connects N type cable end (closing the crossing) 3.
About after the signal of two passages enters cavity from N type cable end respectively, through the coupling column 1 in the cavity, the frequency characteristic of tuning screw rod 2 parts such as grade is selected, carry out filtering respectively after, close road output from N type cable end (closing the crossing) 3.
Because the broadband signal to 800-2200MHz has adopted the filtering of WLAN stopband to realize, only used the filtering chamber of a 100MHz just to realize this function, so device volume reduces greatly, and the signal in the wideband hereto, we also only need to adjust the parameter of this cavity, so index adjustment work also greatly reduces.
The indexs such as number of coupling column and tuning screw rod are by the decision of device index among Fig. 5, and concrete condition has nothing in common with each other.
The course of work of the embodiment of the invention is: full range signal admission passage A, enter the bandreject filtering chamber by input lead, filtered the signal of WLAN frequency range, other frequency band signals be able to by; Full range signal admission passage B enters the bandpass filtering chamber by input lead, the WLAN in-band signal be able to by, other signals are filtered; The output lead of last passage A and channel B is exported from closing road port C through mixer.
Present embodiment can be divided into the WLAN frequency range and two passages of non-WLAN frequency range are analyzed.
In the WLAN path, can calculate the relative bandwidth of 2400-2500MHz path, CW=Δ f/f0=100/2450=0.041.Because relative bandwidth is narrower, can design with common band pass filter method.Signal enters input port, enters into the bandpass filtering chamber by input lead, through after the filtering, exports from closing the road delivery outlet through coupled-wires again.The resonant cavity equivalent circuit theory schematic diagram of WLAN passage such as Fig. 3 channel B.
In non-WLAN path, because the band limits of 800-2200MHz is too big, its relative bandwidth CW=Δ f/f0=1400/1500=0.933 has reached 93.3%.If use a cavity to realize the band pass filter of so big relative bandwidth, be unusual difficulty, ripple, Insertion Loss, band suppress outward and all bad adjustment of index such as standing wave.So normal conditions can be at GSM.DCS, three frequency ranges of 3G use three cavitys to come it is adjusted respectively respectively, then with coupling line and connect 3 cavitys, realize the bandpass filtering of 3 frequency ranges at last.We can see, in fact this scheme is identical at root with the mixer of All-in-One, the volume heaviness, and it mostly is its shortcoming that index is adjusted workload.
From the above considerations, our principle that is to use the WLAN band stop filter taked at this passage designs.Owing to taked the principle of stop-band filter, make the very easy adjustment that becomes of the index of broadband signal, and Insertion Loss, ripple, indexs such as return loss are also all very outstanding.And, also simplified the adjustment work of index owing to,, greatly reduce cost so the structure of device is very small and exquisite than conventional products in the stopband filtering chamber (WLAN stopband) that this passage has only used a kind of frequency range.The resonant cavity equivalent circuit theory schematic diagram of the stop-band filter of non-WLAN path such as Fig. 3 passage A.
The present invention can select interior signal of any frequency range and the broadband signal in other frequency ranges to do and close the road processing.As:
800-960MHz signal and 1700-2500MHz signal carry out two-way and close road output;
1700-1900MHz signal and 800-960MHz, 1900-2400MHz signal carry out two-way and close road output;
1900-2200MH signal and 800-960MHz, 2400-2500MHz signal carry out two-way and close road output;
Or the like situation can design with the wideband path combining method among the present invention.
Claims (5)
1, a kind of wideband path combining method, export on the road of closing of two frequency band signals of realization, wherein passage A is by one section broadband signal, channel B is by narrow frequency signal, it is characterized in that: filtering is carried out in the bandreject filtering chamber to narrow frequency signal among the broadband signal selector channel B in passage A, make it by broadband signal,, select the bandpass filtering chamber of this narrow frequency signal to carry out filtering the narrow frequency signal in the channel B.
2, wideband path combining method as claimed in claim 1, it is characterized in that: passage A stops the WLAN signal to pass through with WLAN signal bandreject filtering chamber, and allow to pass through GSM, DCS, wideband signals such as 3G, another channel B by the WLAN signal, is closed close road that road output realize broadband signal with two paths of signals with WLAN signal bandpass filtering chamber.Can select interior signal of any frequency range and the broadband signal in other frequency ranges to do and close the road processing.
3, adopt the wideband mixer of the described method of claim 1, it is characterized in that: it has two input channel A and B, passage A passes through broadband signal, another channel B is by narrow frequency signal, passage A comprises input port, the bandreject filtering chamber of narrow frequency signal in input lead and the channel B, input port is connected on the bandreject filtering chamber through input lead, outputs to through coupled-wires and closes road port C; Channel B comprises the bandpass filtering chamber of input port, input lead and narrow frequency signal, and input port is connected on the logical resistance of the band filtering chamber through input lead, outputs to through coupling line and closes road port C.
4, wideband mixer as claimed in claim 3 is characterized in that: described bandreject filtering chamber is WLAN signal bandreject filtering chamber.
5, as claim 3 or 4 described wideband mixers, it is characterized in that: its principle equivalent electric circuit of the bandreject filtering chamber among the described passage A is by L
a, L
b, C
a, C
bThe LC filter that constitutes, or the equivalent electric circuit of this LC filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610125436 CN1988417A (en) | 2006-12-11 | 2006-12-11 | Broad frequency path combining method and its path combining device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610125436 CN1988417A (en) | 2006-12-11 | 2006-12-11 | Broad frequency path combining method and its path combining device |
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| CN1988417A true CN1988417A (en) | 2007-06-27 |
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| CN 200610125436 Pending CN1988417A (en) | 2006-12-11 | 2006-12-11 | Broad frequency path combining method and its path combining device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026340A1 (en) * | 2011-08-24 | 2013-02-28 | 京信通信系统（中国）有限公司 | Communication cavity component and merging/branching path structure thereof |
| CN106788309A (en) * | 2015-11-20 | 2017-05-31 | 厦门宇臻集成电路科技有限公司 | Power amplifier with WIFI trappers |
-
2006
- 2006-12-11 CN CN 200610125436 patent/CN1988417A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026340A1 (en) * | 2011-08-24 | 2013-02-28 | 京信通信系统（中国）有限公司 | Communication cavity component and merging/branching path structure thereof |
| CN106788309A (en) * | 2015-11-20 | 2017-05-31 | 厦门宇臻集成电路科技有限公司 | Power amplifier with WIFI trappers |
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Open date: 20070627 |